// Copyright (c) 2010-2016 The Bitcoin Core developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.

#include <node/ui_interface.h>

#include <util/string.h>
#include <util/translation.h>

#include <boost/signals2/optional_last_value.hpp>
#include <boost/signals2/signal.hpp>

CClientUIInterface uiInterface;

struct UISignals {
    boost::signals2::signal<CClientUIInterface::ThreadSafeMessageBoxSig,
                            boost::signals2::optional_last_value<bool>>
        ThreadSafeMessageBox;
    boost::signals2::signal<CClientUIInterface::ThreadSafeQuestionSig,
                            boost::signals2::optional_last_value<bool>>
        ThreadSafeQuestion;
    boost::signals2::signal<CClientUIInterface::InitMessageSig> InitMessage;
    boost::signals2::signal<CClientUIInterface::NotifyNumConnectionsChangedSig>
        NotifyNumConnectionsChanged;
    boost::signals2::signal<CClientUIInterface::NotifyNetworkActiveChangedSig>
        NotifyNetworkActiveChanged;
    boost::signals2::signal<CClientUIInterface::NotifyAlertChangedSig>
        NotifyAlertChanged;
    boost::signals2::signal<CClientUIInterface::ShowProgressSig> ShowProgress;
    boost::signals2::signal<CClientUIInterface::NotifyBlockTipSig>
        NotifyBlockTip;
    boost::signals2::signal<CClientUIInterface::NotifyHeaderTipSig>
        NotifyHeaderTip;
    boost::signals2::signal<CClientUIInterface::BannedListChangedSig>
        BannedListChanged;
};
static UISignals g_ui_signals;

#define ADD_SIGNALS_IMPL_WRAPPER(signal_name)                                  \
    boost::signals2::connection CClientUIInterface::signal_name##_connect(     \
        std::function<signal_name##Sig> fn) {                                  \
        return g_ui_signals.signal_name.connect(fn);                           \
    }

ADD_SIGNALS_IMPL_WRAPPER(ThreadSafeMessageBox);
ADD_SIGNALS_IMPL_WRAPPER(ThreadSafeQuestion);
ADD_SIGNALS_IMPL_WRAPPER(InitMessage);
ADD_SIGNALS_IMPL_WRAPPER(NotifyNumConnectionsChanged);
ADD_SIGNALS_IMPL_WRAPPER(NotifyNetworkActiveChanged);
ADD_SIGNALS_IMPL_WRAPPER(NotifyAlertChanged);
ADD_SIGNALS_IMPL_WRAPPER(ShowProgress);
ADD_SIGNALS_IMPL_WRAPPER(NotifyBlockTip);
ADD_SIGNALS_IMPL_WRAPPER(NotifyHeaderTip);
ADD_SIGNALS_IMPL_WRAPPER(BannedListChanged);

bool CClientUIInterface::ThreadSafeMessageBox(const bilingual_str &message,
                                              const std::string &caption,
                                              unsigned int style) {
    return g_ui_signals.ThreadSafeMessageBox(message, caption, style)
        .value_or(false);
}
bool CClientUIInterface::ThreadSafeQuestion(
    const bilingual_str &message, const std::string &non_interactive_message,
    const std::string &caption, unsigned int style) {
    return g_ui_signals
        .ThreadSafeQuestion(message, non_interactive_message, caption, style)
        .value_or(false);
}
void CClientUIInterface::InitMessage(const std::string &message) {
    return g_ui_signals.InitMessage(message);
}
void CClientUIInterface::NotifyNumConnectionsChanged(int newNumConnections) {
    return g_ui_signals.NotifyNumConnectionsChanged(newNumConnections);
}
void CClientUIInterface::NotifyNetworkActiveChanged(bool networkActive) {
    return g_ui_signals.NotifyNetworkActiveChanged(networkActive);
}
void CClientUIInterface::NotifyAlertChanged() {
    return g_ui_signals.NotifyAlertChanged();
}
void CClientUIInterface::ShowProgress(const std::string &title, int nProgress,
                                      bool resume_possible) {
    return g_ui_signals.ShowProgress(title, nProgress, resume_possible);
}
void CClientUIInterface::NotifyBlockTip(SynchronizationState s,
                                        const CBlockIndex *i) {
    return g_ui_signals.NotifyBlockTip(s, i);
}
void CClientUIInterface::NotifyHeaderTip(SynchronizationState s, int64_t height,
                                         int64_t timestamp, bool presync) {
    return g_ui_signals.NotifyHeaderTip(s, height, timestamp, presync);
}
void CClientUIInterface::BannedListChanged() {
    return g_ui_signals.BannedListChanged();
}

bool InitError(const bilingual_str &str) {
    uiInterface.ThreadSafeMessageBox(str, "", CClientUIInterface::MSG_ERROR);
    return false;
}

bool InitError(const bilingual_str &str,
               const std::vector<std::string> &details) {
    // For now just flatten the list of error details into a string to pass to
    // the base InitError overload. In the future, if more init code provides
    // error details, the details could be passed separately from the main
    // message for rich display in the GUI. But currently the only init
    // functions which provide error details are ones that run during early init
    // before the GUI uiInterface is registered, so there's no point passing
    // main messages and details separately to uiInterface yet.
    return InitError(details.empty() ? str
                                     : strprintf(Untranslated("%s:\n%s"), str,
                                                 MakeUnorderedList(details)));
}

void InitWarning(const bilingual_str &str) {
    uiInterface.ThreadSafeMessageBox(str, "", CClientUIInterface::MSG_WARNING);
}
